This Is the Army is a 1943 American wartime musical comedy film produced by Jack L. Warner and Hal B. Wallis and directed by Michael Curtiz, adapted from a wartime stage musical with the same name, designed to boost morale in the U.S. during World War II, directed by Ezra Stone. The screenplay by Casey Robinson and Claude Binyon was based on the 1942 Broadway musical written by James McColl and Irving Berlin, with music and lyrics by Berlin. Berlin composed the film's 19 songs, and sang one of them.

The movie stars George Murphy, Joan Leslie, George Tobias, Ronald Reagan and Alan Hale, and features a large ensemble cast including Charles Butterworth, Dolores Costello, Una Merkel, Stanley Ridges, Rosemary de Camp, Ruth Donnelly, Dorothy Peterson, Frances Langford, Gertrude Niesen, Kate Smith, and Joe Louis. The cast of both the film, and the stage play on which it was based, included soldiers of the U.S. Army who were actors and performers in civilian life, including Reagan and Louis.